28549663 has 2 divisors, whose sum is σ = 28549664. Its totient is φ = 28549662.

The previous prime is 28549657. The next prime is 28549679. The reversal of 28549663 is 36694582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28549663 - 2²¹ = 26452511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28549063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14274831 + 14274832.

It is an arithmetic number, because the mean of its divisors is an integer number (14274832).

Almost surely, 2^28549663 is an apocalyptic number.

28549663 is a deficient number, since it is larger than the sum of its proper divisors (1).

28549663 is an equidigital number, since it uses as much as digits as its factorization.

28549663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 28549663 is about 5343.1884675725. The cubic root of 28549663 is about 305.6330593821.

The spelling of 28549663 in words is "twenty-eight million, five hundred forty-nine thousand, six hundred sixty-three".